/*
 * Copyright 2019 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.workbench.common.dmn.backend.editors.common;

import java.util.List;
import java.util.Objects;
import java.util.Optional;

import javax.enterprise.context.Dependent;
import javax.inject.Inject;

import org.kie.workbench.common.dmn.api.editors.included.PMMLDocumentMetadata;
import org.kie.workbench.common.dmn.api.editors.included.PMMLIncludedModel;
import org.kie.workbench.common.dmn.api.marshalling.DMNPathsHelper;
import org.uberfire.backend.vfs.Path;

@Dependent
public class PMMLIncludedDocumentsFilter {

    private final DMNPathsHelper pathsHelper;

    private final PMMLIncludedDocumentFactory pmmlDocumentFactory;

    @Inject
    public PMMLIncludedDocumentsFilter(final DMNPathsHelper pathsHelper,
                                       final PMMLIncludedDocumentFactory pmmlDocumentFactory) {
        this.pathsHelper = pathsHelper;
        this.pmmlDocumentFactory = pmmlDocumentFactory;
    }

    public PMMLDocumentMetadata getDocumentFromImports(final Path dmnModelPath,
                                                       final Path includedModelPath,
                                                       final List<PMMLIncludedModel> includedModels) {
        final Optional<PMMLIncludedModel> documentImport = getDocumentImport(dmnModelPath,
                                                                             includedModelPath,
                                                                             includedModels);
        return documentImport
                .map(pmml -> pmmlDocumentFactory.getDocumentByPath(includedModelPath, pmml))
                .orElse(null);
    }

    private Optional<PMMLIncludedModel> getDocumentImport(final Path dmnModelPath,
                                                          final Path includedModelPath,
                                                          final List<PMMLIncludedModel> includedModels) {
        return includedModels
                .stream()
                .filter(i -> Objects.equals(i.getPath(), pathsHelper.getRelativeURI(dmnModelPath, includedModelPath)))
                .findAny();
    }
}
